獲取html標簽屬性

為了獲取html代碼一些標簽屬性，我們可以把這些html當作為一段xml的字符串來處理。可以參考下圖:

 

上圖相關代碼：

 
           
           using System; 
           
 
           using System.Collections.Generic; 
           
 
           using System.Linq; 
           
 
           using System.Web; 
           
 
           using System.Web.UI; 
           
 
           using System.Web.UI.WebControls; 
           
 
           using System.Xml; 
           
 
           
 
           public  
           partial  
           class _Default : System.Web.UI.Page 
           
{ 
           
     
           protected  
           void Page_Load( 
           object sender, EventArgs e) 
           
    { 
           
         
           string htmlcode =  
           " 
           <img alt=\"mvp logo\" src=\"http://images.cnblogs.com/cnblogs_com/insus/MvpPhoto.jpg\" width=\"120\" height=\"30\" /> 
           "; 
           
 
           
        XmlNodeList xnl = GetNoteList(htmlcode,  
           " 
           //img 
           "); 
           
         
           for ( 
           int i =  
           0; i < xnl.Count; i++) 
           
        { 
           
            Response.Write(xnl[i].Attributes[ 
           " 
           alt 
           "].Value +  
           " 
           <br/> 
           "); 
           
            Response.Write(xnl[i].Attributes[ 
           " 
           src 
           "].Value +  
           " 
           <br/> 
           "); 
           
            Response.Write(xnl[i].Attributes[ 
           " 
           width 
           "].Value +  
           " 
           <br/> 
           "); 
           
            Response.Write(xnl[i].Attributes[ 
           " 
           height 
           "].Value +  
           " 
           <br/> 
           "); 
           
        } 
           
    } 
           
 
           
     
           private XmlNodeList GetNoteList( 
           string xmlText,  
           string tag) 
           
    { 
           
        XmlDocument xDoc =  
           new XmlDocument(); 
           
        xDoc.Load( 
           new System.IO.MemoryStream(System.Text.Encoding.GetEncoding( 
           " 
           UTF-8 
           ").GetBytes(xmlText))); 
           
         
           return xDoc.SelectNodes(tag); 
           
    } 
           
}